Richardson started her television presenting career on The Big Breakfast on Channel 4, and thereafter for the next six years appeared regularly in television programmes including Love Bites for ITV, for which she was nominated for an RTS award.[citation needed]

Richardson went on to present Love Bites Back, Dream Ticket, Des Res and the ITV series Big Screen, where she met and interviewed a number of prominent Hollywood personalities.[citation needed]

Richardson has also written and produced television programmes including No Waste Like Home; Turn Back Your Body Clock; and Channel 4's series You Are What You Eat.[4]

Richardson fronted Channel 4's The Sex Education Show,[5] broadcast from 9 September to 14 October 2008. The Sex Education Show returned in March 2009 as The Sex Education Show vs. Pornography. A third series The Sex Education Show: Am I Normal? was broadcast on July 2010. The fourth series, called The Sex Education Show: Stop Pimping Our Kids, aired from 19–21 April 2011. The fifth series began on 19 July 2011.[citation needed]

Richardson presents Channel 4's Secret Eaters, which began on 16 May 2012. She also presents How Not to Get Old alongside Louise Redknapp which began on 7 August 2013. Richardson and Andi Osho present Supershoppers, which began on Channel 4 on 1 February 2016, although Osho has now been replaced by Sabrina Grant.[6]

In 2017, Richardson co-presented How to Retire at 40 on Channel 4. In January, February and April 2018, she was a guest panellist on four episodes of ITV's Loose Women. In February 2018, she co-presented How to Get Fit Fast with Amar Latif on Channel 4.